Here is the full list of all 67 Ultratron achievements.
Double three way bouncy bezerk gun
Quantum-shifted through a boss
Detonated 10 bombfruits
Double three way bouncy max power rapid fire gun
Laser pet levelled up to maximum
Smartbombed 25 enemies with one blast
Shooty pet levelled up to maximum
Drone survived 30 levels
Drone survived 20 levels
Collected 50 fruits
Rocket pet levelled up to maximum
Vanquished 5000 enemies
Maximum score multiplier
Single drone shot down 100 enemy bullets
Held one or more pets for 5 levels without dropping
Killed 1000 enemies with grenades
EMP shocked 25 enemies in one blast
Detonated 25 smartbombs in a single game
Survived assault level without taking damage
Collected 25 fruits
Defeated two bosses
Drone survived 10 levels
Beat a level without firing a single shot
Killed 500 enemies with grenades
Single drone vanquished 250 enemies
Vanquished 2500 enemies
20 kills with a single grenade
EMP shocked 10 enemies in one blast
Defeated Letum
Maximum shields
Grenade add-on upgrades maxed
Maximum drone upgrades
Maximum dot slurp range
Maxed turbo power and recharge
Maximum droid power
Upgraded laser pet to maximum
Upgraded rocket pet to maximum
Upgraded shooty pet to maximum
Upgraded all pets to maximum parameters
Killed 100 enemies with grenades
Player has fired 10000 shots in a game
Collected 1000 dots
Defeated Lues
Full complement of smartbombs
10 kills with a single grenade
Got 100% on a challenge stage
Awesome double three way bouncy gun
Defeated Bellum
Got 100% on a dodge stage
Smartbombed 10 enemies with one blast
Collected 10 fruits
Consumed 10 consecutive fruits
Collected 500 dots
Defeated Ieiunitas
Vanquished 1000 enemies
Collected 250 dots
Vanquished 500 enemies
Player has fired 1000 shots in a game
Collected 100 dots
Vanquished 100 enemies
Vanquished 10000 enemies
30 kills with a single grenade
Player has fired 100000 shots in a game
Smartbombed 50 enemies with one blast
EMP shocked 50 enemies in one blast
Held one or more pets for 10 levels without dropping
Held one or more pets for 20 levels without dropping